Grasshopper

algorithmic modeling for Rhino

Dear Santa #2 : Sum By Index Map.

Dear Santa (DR) 

New Challenge for My Christmas Gift 

i have two List one with a Index Map of the Original Indices to Set Indices product of the Create Set with 3576 Items 

the second list have 3576 Items with Numbers. 

I need to make a Sum of my second list items as the Mapping in the Create Set to achieve the same Lenght List of S in the Create Set 

as in the sample below 

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Replies to This Discussion

Permalink Reply by Andrew Heumann on December 23, 2012 at 11:52am

if you use "graft by data" from my HDT utilities, with list 2 as the data and list 1 as the paths, and then apply mass addition, I think this will produce the desired result. 

Permalink Reply by Andrew Heumann on December 23, 2012 at 12:58pm

like so:

Permalink Reply by Toussaint Jimenez Rojas on December 23, 2012 at 3:00pm

Its Works Thank Andrew :) 

Permalink Reply by Benjamin Golder on December 23, 2012 at 7:20pm

This is a common problem. Here is an old discussion with several other solutions. Kudos to Andrew for making a component that does this.

http://www.grasshopper3d.com/forum/topics/list-dispatching-to-multi...

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